Normalization Integrals of Orthogonal Heun Functions

Details Normalization Integrals of Orthogonal Heun Functions Normalization Integrals of Orthogonal Heun Functions

1997-07-14

arxiv.org/abs/funct-an/9707004v1

Journal of Mathematical Physics, 1997, volume 38, page 3692.

Physics

Mathematical Physics

12 pages; no figures

Scientific paper

10.1063/1.532062

A formula for evaluating the quadratic normalization integrals of orthogonal Heun functions over the real interval 0 <= x <= 1 is derived using a simple limiting procedure based upon the associated differential equation. The resulting expression gives the value of the normalization integral explicitly in terms of the local power-series solutions about x=0 and x=1 and their derivatives. This provides an extremely efficient alternative to numerical integration for the development of an orthonormal basis using Heun functions, because all of the required information is available as a by-product of the search for the eigenvalues of the differential equation. 02.30.Gp; 02.30.Hq; 02.70.-c; 02.60.Jh

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